Youcancertainlyleavetheclassroomas

发布时间：2020-07-26 19:30:40

You can certainly leave the classroom as soon as your homework__________.A.has doneB.has been doneC.will be doneD.will have been done

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B解析在时间状语从句中可以用现在完成时表示将来，强调从句的动作发生在主句谓语所表示动作之前。
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